The indoor plant cultivation apparatus of the present invention was devised in view of the problems of the prior art as described above. At the top, a certain number of semi-circular port bottom supports are formed upwardly inclined to support the bottom of the cylindrical planting pot and the upper side is opened. At the bottom, a certain number of semi-circular port upper supports are formed with a certain number of height adjusting members stacked vertically to be stacked vertically with a downwardly inclined to support the upper surface of the cylindrical planting pot, and a lower number of semi-circular port upper supports are formed with water supply holes formed. After adjusting the height, adjust the height of the plant cultivation part by combining the height adjustment finishing member at the top, and at the same time, insert the circular port by matching the upper half of the semi-circular port bottom support and the upper half of the semi-circular port opening. By allowing the hole to be formed, it is possible to conveniently cultivate a large amount of plants even in a small space indoors. The special structure of the height adjustment member and the height adjustment finishing member constituting the plant cultivation part makes it easy to manufacture and reduces the manufacturing cost. The assembly of the height adjustment member and the height adjustment finishing member and the water supply hose installed therein The structure is improved so that it can be installed detachably, so it is very easy to install and connect the water supply hose, but the support area of the water supply hose is added, and the assembly state is very strong after assembly, so that the height adjustment member and the height adjustment finishing member are integrated. Since each port does not play separately, the port insertion hole is continuously maintained in a circular state and is not collapsed by external force, so that it can be safely cultivated. It is a planting po